KR20030019014A - A train approach alarm system - Google Patents

Abstract

PURPOSE: A train approach alarm system is provided to previously prevent a safety accident by providing approach train information to a maintenance personnel and a lineman who works in a train track. CONSTITUTION: A transmitter and a receiver classify each situation by a peculiar code and informs a corresponding situation. The train approach system confirms whether a signal from the transmitter is correct by comparing a received ID code with an ID code of the receiver. The transmitter transmits a current situation by a code. A transmitter includes a control and processing section, an RF encoder, a low pass filter(LPF), a PWM modulator, an LC tank ANT, a band pass filter(BPF), and a save oscillator. The receiver measures a received code and a current receiving sensitivity and informs an alarm level by states. The receiver includes an LC tank, an RF amplifier, a mixer, an IF amplifier, a band pass filter(BPF), a control and processing section, a comparator, a decoder, a low pass filter(LPF), and a peak detector.

Description

A train approach alarm system

The present invention is a train approach alarm system in detail installed in the locomotive and other power vehicles (motor cars, detection cars, track repair equipment, etc.) to provide a radio wave transmitting device fixed to provide the information of the train to the terminal of the worker working on the track It is a system.

In general, when working on the train line, the work mark is set 200 ~ 400 meters ahead according to the operating speed of the train at the working position to inform the train engineers that they are working, and an alarm system is used to sound a miracle when approaching the train. However, this alarm system has many safety accidents because the working ships and security officers are not aware of the miracle of the train due to the noise of maintenance equipment, the noise of cars, aircrafts, etc. passing through the vicinity, the concentration of work, and the thoughts. It is happening.

An object of the present invention is to prevent the safety accident in advance by providing the information of the approach train to the crew and security personnel working on the train service line more reliably.

1 shows a relationship between a sending device and a receiving device

2 is installed a mobile repeater when jamming by the feature

3 is a block diagram of the originating apparatus

4 is a block diagram of a receiving device

5 is the data format

6 is a data wave form of transmission and reception

7 is an operation flowchart

Hereinafter, the configuration of the present invention will be described in detail with reference to the accompanying drawings.

1 is a schematic diagram illustrating the relationship between a transmitter and a receiver. The operating distance of the alarm system is set to about 500 m and the reception sensitivity is measured within the radius to inform the train situation.

The originating device and the receiving device identify each situation as a unique code and notify the situation. Confirmation that the signal sent from the originating device is correct is verified by receiving an ID code and comparing it with the ID code of the receiving device.

The originating device transmits the current situation to the code, and the receiving device measures the received code and the current reception sensitivity to notify the alarm level value for each state.

Status level alarm level is divided into three stages as follows.

Level 0-Safety situation (train missing-no signal received)

Level 1-Attention (less than 30km / h during low speed, distance over 500m or moving in the station)

Level 2-Alarm condition (over 30km / h during high speed, within 500m distance)

2 is a case where a feature or the like hinders the propagation of radio waves, and when a feature or the like hinders the propagation of radio waves, a mobile repeater is installed at the point. The repeater has both functions of receiving and sending radio waves at the same time.

3 and 4 are block diagrams of the transmitting and receiving apparatus.

5, a unique identification code is required to inform each situation in the form of transmission data. The unique identification code consists of 32 bits in total and uses an error correction code (CRC) in consideration of a communication error. The unique identification code consists of an 8-bit header, 8-bit data code, and 16-bit error correction code.

6 is a waveform of a transmission / reception code signal of data;

7 is an operation flowchart of the alarm system. When power is supplied to the transmission apparatus, the transmission apparatus enters the operation mode in the standby state, and reads the movement or speed of the train to transmit the train status. The antenna uses a forward directional antenna. In the case of the receiving terminal, when power is supplied, it receives a radio wave in a standby state and checks whether code information is received. If the code information is received, the code information is received and the transmission error is checked. If there is no error in the data, check the header and if the information is correct, the data is decrypted and the current situation is announced by bell or vibration. The antenna of the receiver terminal uses an omni-directional PCB pattern antenna.

As described above, according to the present invention, the safety incidents caused by the crew and the security guard working on the train service line can be greatly reduced due to various reasons, and the present invention can be applied to the railroad crossings. Therefore, physical damage can be reduced.

Claims (1)

Worker's terminal that transmits train information (speed, approach distance) by installing radio wave transmitting device and directional antenna in locomotives and other power vehicles (motor vehicles, detection cars, track repair equipment, etc.) Alarm method to provide information of trains.